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To help with the contraction and expansion of the rail roads

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Q: Why are bolts on railroad tracks in oval holes?
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Why are the bolts that hold steel rails together in oval holes?

It has to do with the design of the bolts. The reason that head of the bolt is oval in shape. The head of a bolt fit flush into the bar and set in opposing sets is so that a piece of dragging equipment will not shear off all the bolts in a joint but rather the just the nuts one side. As a result if the hole is not oval on one side there would be no way to tighten or loose the bolts in a joint.Second Answer: They would be oval shapes so when contraction or expansion happens they wont snap.


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Due to the differences in engineering and the parts involved, there really is no way to convert an oval above ground pool into a round pool.


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two section of railway track are joined together by welding.instead they are laid with gaps between them.fish plates,fastened by nuts and bolts which are able to slide along the oval holes,are used to join two section of railway track......


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